PROWL is the exclusive product design partner for GOB, the world’s first plastic-free earplug with a conscience made from lab-grown mycelium. These single-use plugs have been engineered by nature to tune your experiences to the right volume, without any harmful materials or chemicals. They are completely home compostable and will feed the ground wherever they end up.

Earplugs might not sound like a big environmental problem, but the world manufactures 40 billion of them a year. To put that into context, if laid end-to-end, 40 billion earplugs would stretch over 2.4 million miles, which is enough to wrap around the Earth nearly 100 times.